Abrading-tool.



No. 739.023, I PATENTED SEPT. 15,1903.

J. 0. ROLLINS.

ABRADING TOOL.

APPLICATION FILED JULY 15, 1902.

N0 MODEL.

Fig.1

proper.

UNITED STATES Patented September 15, loos;

PATENT OFFICE.

JOHN O. ROLLINS, OF TUOLUMNF, CALIFORNIA, ASSIGNOR OF ONE- HALF TO J. B FERGUSON, OF TUOLUMNE, CALIFORNIA.

ABRADlNG-TOOL.

SP ECIFIOATION forming part of Letters Patent No. 739,028, dated September 15, 1903.

Application filed July 15,1902.

To all whom it may concern:

Be it known that 1, JOHN 0. Beware, a citizen of the United States, residing at Tuolumne, county of Tuolumne, State of California, have invented an Improvement in Abrading-Tools; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to abrading-tools; and it consists of the parts and the constructions and combinations of parts hereinafter described and claimed.

Figure 1 is an elevation of the device ap plied to a sewing-machine with a grindingwheel in section to show tapered spindle. Fig. 2 shows a tool-holder. Fig. 3 shows a grinder with removable abrading-strip. Fig. 4 shows the polishing attachment. Fig. 5 shows a tool-rest. Fig. 6 shows a support used in conjunction with my attachment, and Fig. 7 shows means of engaging and disengaging the ends of the belt.

A represents the frame of a well-known type of sewingma'chine used by shoemakers, which is provided with the two grooved beltpulleys 2 2', the one connecting with the treadles of the machine, the other being utilized in the present instance to drive the mechanism hereinafter described. A stand 2', having the bracket-arms 3, is removably secured to the table of the machine by means of clamp devices 4. A horizontal shaft 5 is journaled in the bracket-arms 3 and carries a grooved pulley 6, by which motion is imparted to the shaft through belt 7 from the sewing-machine pulley 2. This belt is provided with the hook S at one end and the eye 9 at the other, whereby it can be quickly uncoupled in case it is not desired to run the shaft continuously with the sewing-machine One end of the shaft 5 is provided with the tool-holder 10, which has a socket adapted to receive a drill 10 or the like, and a locking-screw 11. This end of the shaft extends far enough beyond the line of the machine-frame to allow for the free movement and handling of the material. The opposite end and theintermediate' portion of the shaft is designed to receive grinding-wheels, polishors, brushes, buffers, 850. In the present instance I have shown the shaft as provided firmly on the wheel.

Serial No. 116,610. (No model.)

with an adjustable flanged collar 12. Against this collar fits a belt-pulley 13, and the latter is clamped in place by means of the flangenut14:, threaded on the shaft. The end of the latter is threaded and tapered, as shown at 15, to receive a detachable tool-holder 16 or a grinding-wheel 17. The holder 16 is provided with a tapered socket at the round end to screw onto the spindle 15. The opposite end is polygonal to receive a wrench and is socketed to take bits, emery-wheels, and the like.

The grinding-wheel 17 has a threaded tapered bore corresponding to the spindle 15. This wheel, which may be of wood or metal, has a depression upon its peripheryin which is seated a flat segmentalspring 18. The wheel is covered by a strip of felt 19, glued to the surface of the wheel and the spring after the latter has been secured on the wheel. The spring is secured at one end, andthe other end is adapted to be raised to receive the ends of a flexible abrading-strip 20, as sandpaper or emery-cloth, and on being released to clamp these ends and hold the strip Two shallow transverse notches or keyholes 21 22 are made in the wheelimmediately beneath the spring. These notches are adapted to receive a fiat key 23. To place a fresh strip of sandpaper", for instance, on the wheel, the keygis'inserted in the rearmost notch 22 and tu rned edgewise to lift the spring. One end of the strip is then inserted beneath the spring and up against the key. Thelatter is then turned and withdrawn, leaving the paper clamped beneath the spring. The strip is then folded back over the spring and drawn tightly around the wheel. The key is next inserted in notch'21 and turned, bringing the paper againstthe spring and so holding it against being withdrawn. The free end of the paper is then placed beneath the end of the spring and the key turned and withdrawn, whereupon the strip is firmly locked in place on the wheel. When one of these abrading-surfaoes becomes worn out, it maybe quickly removed and another inserted in its stead. These sand paperwheels are intended especially for trimming rubber heels.

Extending outwardly from the stand 3 in convenient position to the operator is a projection or arm 24, which carries at its outer end a pulley 25 in line with pulley 13 on shaft 5. Over these pulleys runs a flexible belt 26 of suitable material for polishing shoes.

In Fig. 6 is shown a simple device for holding heels and other things to be bored in relation to the drill-point. This consists of a bar 27, adapted to have one end rest upon the floor and the other to be grasped by the operator. The bar is slotted lengthwise at 28, and a block or rest 29 is adjustable on the bar by means of a set-screw 30, passing through the slot and engaging the block. The end of the bar resting on the floor may be shod with the prongs 31 to prevent slipping.

A shoemaker having his sewing-machine thus equipped has the means immediately at hand for keeping his various knives and other tools in order and is enabled, by means of the drill attachments, the grinder, and the polisher, to supplement to a marked degree his own handicraft.

In Fig. 5 is shown a form of rest or support for steadying tools while grinding them and for analogous purposes. It consists of a bent metal strip or casting 32, adapted to be socured to the frame and to have its horizontal rest portion suitably supported in reference to the wheel 17. The other member of the support 32 is slotted lengthwise, asat 33, and its lower edge is serrated, as shown at 34. A bolt 35, held in the frame, passes through the slot and engages a threaded projection or nut portion 36, by which the support is clamped in position when adjusted in suitable relation to the wheel. A slotted guide 37 prevents lateral displacement of the support, and a pivoted plate having a curved serrated edge 38, engaging the serrations 34, holds the support at any height or angle desired.

Having thus described my invention, what I claim, and desire to secure by Letters latent, is

1. In a device of the character described, a grinder and polisher comprising a wheel having a depression extending partially around its periphery, a normally retracted or depressed flat segmental spring seated in said depression, said spring fixed at one end to the wheel, transverse notches in the wheel beneath the spring and a key fitting said notches and adapted when turned to lift the spring to permit the insertion of the ends of a flexible abrading-strip beneath the springsubstantially as described.

2. The combination of a wheel having a flexible, removable abrading-covering; a normally retracted spring-clamp means on said wheel by which the strip is held in position thereon; and means for expanding the clamping means said clamping means automatically returning to normal position when the expanding means are withdrawn.

3. The combination of awheel, a normally retracted segmental spring as 18, said wheel being provided with keyholes 21 22 adapted to receiveza key 23 to lift the spring to engage a flexible abrading-strip, said spring automatically resuming a normal retracted position and clamping the strip when the key is removed.

In witness whereof I have hereunto set my hand.

JOHN O. ROLLINS. Witnesses:

C. DERING, WILMAR DEWITT. 

